Turnbuckle is an industrial accessory used to adjust tension, fasten or connect metal structures. It consists of a metal rod with left-hand and right-hand threads at both ends, two end joints with holes or hooks, and a central adjustment nut. By rotating the central nut, the connection length can be flexibly adjusted. It is widely used in power fittings, communication cable installation, bridge construction, ship equipment and other scenarios. It is a key component to improve structural stability and safety.
Handan Jinmai Fastener Manufacturing Co., Ltd. specializes in the production of high-quality turnbuckle bolts, providing customized designs and standardized products to meet the stringent demands of global customers for high strength, corrosion resistance and long life.
1. Excellent material performance
- Made of high-quality carbon steel (Q235B, 45# steel) or stainless steel (304/316), with a tensile strength of ≥500MPa, excellent weather resistance, and adaptable to extreme environments from -40℃ to 300℃.
2. Precision thread design
- Left-handed and right-handed threads match precisely, the central adjustment nut is knurled on the surface, non-slip and easy to operate, and the adjustment accuracy is ±1mm.
3. Multiple surface protection
- Hot-dip galvanizing (average zinc layer ≥85μm), Dacromet coating or electroplating treatment, passed the salt spray test for 1000 hours without rust, and extended outdoor service life.
4. Strict quality control
- Full-process ISO 9001 certified production, 100% load testing, in line with international standards such as ASTM F1145 and DIN 1480.
1. Raw material screening
- Select high-purity steel, and use a spectrometer to test the composition to ensure that the mechanical properties of the material meet the standards.
2. Precision forging and processing
- The end joints are die-forged, and the rod body is threaded by a CNC lathe, with a tolerance of ±0.1mm.
3. Heat treatment and strengthening
- Tempering treatment (quenching + tempering) increases the hardness to HRC 28-32, eliminates internal stress, and enhances fatigue resistance.
4. Surface treatment and testing
- Automated galvanizing line processing, coating thickness laser detection; through magnetic particle inspection and dynamic load testing, the risk of cracks and deformation is eliminated.
Material options: carbon steel (Q235B/45#), stainless steel (304/316), alloy steel (optional)
Specification range: rod diameter M12 to M48, length 200mm to 2000mm (support non-standard customization)
Load capacity: working load 1 ton to 50 tons, breaking load ≥ 2 times the working load
Surface treatment: hot-dip galvanizing (in accordance with ISO 1461), Dacromet, electroplating nickel, epoxy spraying
Applicable standards: ASTM, DIN, GB/T, JIS
Temperature tolerance: -40℃ to 300℃ (special coating can be extended to 500℃)
Certification support: CE, RoHS, SGS test report
Conclusion：
Handan Jinmai Fastener Manufacturing Co., Ltd. has been deeply involved in the field of power fittings, communication accessories and fasteners for more than 20 years. With "precision manufacturing, reliable connection" as the core, it provides customers with a full range of turnbuckle bolt solutions. From raw material procurement to finished product delivery, we implement a strict quality management system, combined with advanced CNC equipment and a team of senior engineers to ensure that each product can meet the long-term and stable needs of high-voltage transmission towers, cross-sea optical cables, heavy machinery and other scenarios.
We support personalized customization services (materials, sizes, surface treatments), provide technical drawing review and fast delivery guarantees, and help global partners improve engineering efficiency and safety. If you need sample testing or technical consultation, please contact Handan Jinmai's professional team and let us become your trusted Chinese supply chain partner!
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